霍林河流域湿地土地利用/土地覆被类型的渐变过程

Modification Process of Land Use/ Land Cover Type of Wetlands in Huolin River Catchment

研究了霍林河流域自然湿地和人工湿地的面积动态变化以及土地利用/覆被变化过程——渐变过程,结果表明1986～2000年期间自然湿地的面积呈缩减变化,而人工湿地面积则呈增长变化;1986～1996年期间除河流湿地没有发生渐变过程外,其它类型湿地之间普遍存在着渐变过程,其中沼泽的渐变过程最为显著,表现为大幅度缩减,而滩地、湖泊、水库坑塘和水田在渐变过程中则表现为增加变化。1996～2000年期间各类型湿地之间普遍存在着渐变过程,但不同的是,沼泽湿地面积在渐变过程中表现为大幅度增加,而河流、滩地、湖泊和水库坑塘却表现为大幅度缩减;同时沼泽、滩地、湖泊以及水库坑塘在此期间都有向水田发生转变,表明人类的活动范围在不断的扩展,对湿地的开垦力度也在不断加强。

The dynamics change of natural wetland and constructed wetland and land use/land cover change process-modification were studied in Huolin River catchment. The results showed that the area of natural wetland was decreased and that of constructed wetland was increased, compared with 1980's; during the period of 1986 to 1996, it was general that there existed modification process between other types of wetlands except river wetland, where the modification process of marsh wetland was most notable, with the tendency of decreasing; but as for river beach, lakes, reservoir and paddy field, their modification processes showed the tendency of increase; there nearly existed modification process between all types of wetlands during the period of 1996 to 2000, but what is different is that marsh wetland areas showed the tendency of increase, and all of the areas of river beach, lakes, reservoir and paddy field showed that of decrease during the course of modification processes; moreover, paddy field had modification relationship with mash, river beach, lake and reservoir in this period, manifesting that the scope of human activity was extending and the wetland area reclaimed was increasing.